Furnace



April 1927 c. BOLLlNGER FURNACE 2 Shets-Sheet 1 Filed March 15. 1925 //7 van 70/ Aff'y.

April 19 1927.

c. BOILLINGER FURNACE Filed March 15. 1925 2 Sheets-Sheet 2 /n venfor Char/6's B0/// Patented Apr. 19, 1927.

STATES arm-cs.

earne s ,roti iii'o'rin, ciiroAG'o, ItLINo'is, Assumes 'ro WEST RN ELECTRIC coivi'ranY, mconrommn, on NEW YORK, N. Y., A CORPORATION OF NEW YORK.

FURNACE.

Application filed March 13, 1925. Serial No. 15,212.

This invention relates to furnaces and more particularly to steam boiler furnaces, and has for its primary object the provision of an improved baffle wall and unproved means for preventing silica slag formation upon the furnace walls adjacent the fire bed and grate;

In accordance with the general features of this invent-ion there is provided in one em bodiment thereof a flat bathe wall disposed above the lire bed and extending forward thereov'er front a bridge wall at one end of the fire bed. Embedded in the bafile wall are a plurality of steel pipes in the form of a coil through which water is circulated in the operation of the furnace. The coil structure functions to give rigidity to the baffle wall and due to the water circulating therethrough maii'itains-it at such a temperature that any tendency thereof to disrupt 'or become deformed due to the intense heat is minimized. Disposed adjacent the tire bed along three sides thereof is a second coil composed of steel pipes whichis In the operation of the furnace the water circonnected tothe first mentioned coil".

culates from the boiler through the last mentioned c011; through thebagflle wall coil and then back to the boiler. This circulation of water from the boiler through the several coils adj acent the fire bed tehdstb increase the heating surface of the boiler.

The primary purpose ofthe coil positioned along the three walls of the furan'ce 'adja' cent the fire bed is tomai'ntain'the walls at such a teml'jerature to prevent formation upon the walls of the furnace of silica slag caused by the fusing'of the-fire brick lining due to the intense heat.

Other objects and advantages ofthe invention will more fully appear from the following detailed description taken in con nection with the accompanyihg drawings which illustrate one embodiment thereof, in which- Fig. 1 is a longitudinal vertical section through a water tube boiler furnace embodying my improvements;

Fig. 2 is a fragmentary vertical section taken on the line 22 of Fig. 1 looking in the direction indicated by the arrows;

Fig. 3 is a fragmentary plan section taken on the line 33 of Fig. 1 looking in the direction indicated by the arrows, and

Fig. 4 is an enlarged detail view of one brick construction common to furnace set'-- tings and 13 indicates a coking arch eXtending rearwardly and over the forward end of the fire bOX OI combustion chamber 14. A boiler tube bank of well known type is shown at 15. To the rear of the front wall (not shown) below the coking arch l3 and extending upwardly from the floor of the furnace is a bridge wall 16. A traveling grate 17 is mounted within the the box 14 in the form of an endless chain formed of a multitude of interconnected links, the upper portion of the grate fo rming the active or fuel bed supporting area thereof. A drum is indicated at 18 which is suitably connected to a feed water supply.

Inthe construction 'of furnaces where the available space islimited and it is sometimes necessary to provide a boiler of a certain capacity it is necessary to build the bathe wall which extends forwardly of the bridge wall and integral therewith, which is indicated at 20, flat instead of arched, as is the usual construction. To'provide for sufficient rigidity in the flat bathe wall 20 there is provided 'a pipe coil 2-1 around which the usual type of fire brick is built, the pipe coil forming the necessary support for the wall and, in the operation of the furnace, water is circulated through the coil which functions to reduce the temperature of the brick work within the arch and adjacent the coil without destroying the effectiveness of the intensity heated outside surface thereof which functions to ignite the gases escaping from the fire bed. The cooling of the inside brick functions to reduce to a. minimum any tendency of the brick workto disrupt or be come deformed.

lVithin the combustion chamber 14- adjacent two sides of the fire bed and at the rear thereof along the bridge wall 16 within suitable depressions 22 formed in the side and bridge walls is a continuous coil of pipe 23 through which water from the drum 18 is circulated in the operation of the furnace. A vertically extending pipe 24 connected at its upper end to the drum 18 is connected at its lower end with one end of a horizontally disposed pipe the greater portion of which lies within the depression 22 in the side wall 11 of the furnace. The right hand end of the pipe 25 (Fig. 3) is angular-1y formed and is extended through the side wall and is in communication with another pipe J lying within the same de- 'iression in the furnace wall and positioned directly below the pipe 25, through a j unction box 28 of the usual type. The pipe 27 suitably connected at its left hand end (Fig. 3) with a laterally extending pipe 29 carried in the depression formed in the bridge wall. The pipe 29 is in turn connected with a pipe 30 carried in the depression formed in the side wall 12. The pipe (30 at its right hand end is connected to another pipe 2-33 mounted in the same depression 22 as the pipe 30 and positioned directly thereabove. The connection between the pipes 30 and 2.3;? is similar to that of the pipes 25 and 27. The left end of the pipe 32% is connected to a laterally extending pipe I'l-lpositioned. within the depression and above the pipe 2), the pipe 3i in turn being; connected outside of the furnace wall ii to a vertically extending pipe 35 (Fig. l), the upper end of which is connected to the inlet end of the pipe coil 21 embedded in the battle wall 20, the outlet end of the coil 21 being connected to the water druin 18 by a vertically extending pipe 36. It will be observed, referring particularly to Fig. 3, that each length of the horizontally disposed pipes forming the coils 2i and 23 is adapted to be readily cleansed of sediment and corrosion through the junction boxes 98 positioned without the walls of the furnace and shown in detail in Fig. i. The piping or tubes used in forming the coils Q1 and 23 is preferably of the same size as the tube used in the boiler tube bank 15, there by permitting the use of the ordinary cleaninn" brushes or tools adapted to be used in the boiler tubes for chaining the coils 2i and 23.

in the operation of the furnace, water circulating through the coil. 23 functions to draw a suliicient amount of heat from the walls of the furnace adjacent the slag line to prevent any fused silica formed by the intense heatupon the walls from flowing down the wall and forming an enlargement of silica slae' adjacent the fuel bed and grate which might in time interfere with the proper operation of the moving grate and di turb the tire bed thereby reducing the etiiriency of the furnace.

The combining of the coils 21 and 23 into a single circulatory system connected to the water drum 18 results in an zujlvantage other than that of simplifying the connections therefor and the means of supplying the necessary water to cirra'llate theretlu'ough, in that the water circulating through the coils within the ci'unbustion chamber letactually increases the heating; surface of the boiler, thereby adding to the elliciency of the furnace.

lVhat is claimed is:

1. in a steam boiler furnace having); side walls, a grate, a bridge wall extending; between the side walls of the furnace and adjacent one end of the grate, a baiile wall, and a sinuous chamber adapted to hold a cooling; medium mounted in depressions formed in the bridge and side walls adja cent the top surface of the grate and also extended to and embedded within the battle walls, the inlet and outlet ends of said chamber connected to a supply source of the cooling medium.

In a steam boiler furnace haying side walls, a water drum, a grate, a bridge wall. extending between the side wills of the fill.- nace and adjacent one end of the grate, a ballle wall extending from the bridge wall and over the grate, and piping mounted in pockets formed in the bridge and side walls adjacent the top surface of the grate and also extended to and embedded within the ballle wall, the inlet and outlet ends of said piping connected. to said water drum.

3. In a furnace having a. boiler tube bank and side walls, a water drum, a grate. a bridge wall extending between the side walls of the furnace and adjacent one end of the grate, a bai'lle wall extending from the bridge wall and over the grate, a boiler tube piping mounted in pockets forn'led in the bridge and side walls and also extended to and embedded within the ballle wall, said piping extended through the walls to the outside of the furnace and provided with a return loop, said outside portion adaptedv to be opened for the insertion of cleaning: means, the inlet and outlet ends of said piping connected to said water drum.

In witness whereof, I hereunto subscribe i'ny name this 5th day of March A. 1)., 1925.

CHARLES BOLLINGER. 

